Yeah, it's great. It's close to Elegy, which is pretty amazing. I'm not sure on the exact slow% but I know it's pretty high(probably close to 40-50% like elegy). I know when the enemy has elegy and slow II on they attack REALLY slow. I'm curious about the increased effects when slow II is upgraded.

I plan on doing Paralyze II (x2), Slow II (x2), and Blind II (x2) personally. PhalanxII seems only mildly helpful, and I was told that DiaIII and BioIII only last 30 seconds at first level. Unfortunately, I have not confirmed that myself so I don't know.